Process of manufacturing artificial marble.



' Thus for a non-porous, hard, stone-like sur- UNITED STATES PATENT oruion.

NIELS K. ANDERSEN, OF OAKLAND, GALIFORNIA,-ASSIG:NOR0F'OIIE-THIRD.TO CHARLES DUTHIE, 01E SAN MATEO, CALIFORNIA.

' IPRQGESS OF MANUFACTURING ARTIFIGIAL'MARIBDE.

No Drawing.

To all whom it may concern:

Be it known that I, NntLs K. Azvnnnsmv, a

' subject of the King of Denmark, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Processes of Manufacturing Artificial Marble, of which the following is a specification.

My invention relates to a compound 1n imitation of marble and like material, and in a means for forming a body part and a facing therefor, as will be more fully described in the following specification.

In the preparation of the body portion of my compound I take 40 parts of magnesium oxid (MgO), 1 part of acetate of lead and 16 parts of finely powdered silica and Il'llX these together dry. I then take chlorid of magnesium, dissolve it in water and age it by hydrometer measure to'what is nown on such gages as 22:} B, and then take sulfate of zinc, dissolve it in water and gage it to I B in the same manner as the magnesium magnesium chlorid and 2 parts of the chlorid. I then take 98 parts of the gaged gaged sulfate of zinc and mix these together. Next I take the dry mixture already described and mix it with enough ofthe last named mixw tureto make the whole of the consistene of cream. I then take 43 parts of filler w ich may be com osed of coarse silica, hardwood sawdust, as es, asbestos, marble dust, or

' equivalent suitable material, which I use required for magnesium chlorid and I compound, I'take parts of fine singly or mix one or several together to suit the texture, weight, hardness or flexibility different purposes the material is to be used for and add this to the former mixture. If this is too stiff, enough of the sulfate of zinc mixture may be added to make it plastic. In order to provide the proper facing for this y ground magnesium oxid (MgO) and 1 partacetate of lead and mix them dry. I then mix this with enough of the magnesium chlorid and sulfate of zinc mixture, described in specification for mixing body part, to make the mixture like thick cream. To this I add 49 parts of filler, the nature of which may be varied according to the surface required.

face I use finely powdered silica, marble I dust, etc., but where a more flexible surface similar material. I mixthe'filler very thoroughly with the wet mixture and: if this is too. stiff I add enough of the gaged magne- :sium chlorid solution described to :make it like paste. In cases where a very strong surface is required and the color of the materlal allows it, I use 99 parts of magnesium 'oxid and 1 part of acetate of lead and mix them dry. Then I take 98 parts ma esium chlorid gaged to 30 B and 2 arts 0 sulfate Patented Aug. 1,191 1.

of zinc gaged to 30 B, mix t ese andcadd to first mixture. All coloring used must be mixed with the material used for facing and care must be taken to avoid any water or filler containing lime. In forming articles from this compound, I first take sheets of glass or polished metal of the size of slabs required and place around this frames of wood, glass or metal. The face of the mold is then dampened by magnesium chlorid, gage 22-} B, and the facing material is first poured intothe mold to the desired thickness. This material may be then grained or any desired pattern or picture ma be designed upon it. The body matei'ial is then poured in to any required thickness and will unite with the facing material. It is then left to set in a room heated to 60 Fahren heit. When it has set, it may be removed from the mold and the facing material will have-apolish equal to glass; no subsequent rubbing or work of any kind being required as a finish.

lmitations ofthe tile ma be made in large polished metal. The casts may be reinforced, if required, by wood or metal. Tiles or other articles made in this manner are ready for use, when removed from the mold and properly hardened, and have a very superior polish and require no other work, thus I greatly reducing their cost.

Having thus described my invention, what I claim and desire to secure by Letters Patent is-- Y The hereindescribed process of manufacturing artificial marble and the like, which consists in forming a pasty facing composition therefor by successively mixing together filler to the x 'esu1tant mixture; pouring the v facing composition into a mo1d; form1ng a composition forthe body of the marble by successively mixing to ether magnesium oxid, lead acetate and si ice in. a dry state, mixing with this dry mixture a mixture of dissolved magnesium chlorid and dissolved zinc sulfate, and. adding a filler to the resultinto said mo therein; andello'wing said composit ons to 15 f unite and set. i.

ant mixture; fouring the body com iosition upon the facing composition In testimony whereof I have ii e'ieunto set my hand In the presence of two subscribing.

.wltnesses. I

NIELS K. ANDERSE'N.

Witnesses:

JOHN H.f"HnRRINs W. W. HnAnEY. 

